It really does depend on the brand and model of tire. I had more tire clearance with numerically taller and wider 235/45-17 Pilot Sports than with 225/50-16 Sumitomo HTR Z. The Sumis are just wider regardless of their indicated size. The Pilot Sports did offer a great amount of rim protection. They saved me from really curbing the wheels once.
I've always wanted to run 245/40-17 on 17x8.5 wheels. Tire Rack has the Sumitomo HTR Z for 67 bucks each in that size but they'll probably be too fat to fit. Those tires are sticky as hell too. The 225/50-16 are mounted on stock 16x7 Swings and have serious curb protection.
This pic is the 235/45-17 Pilot Sports on 17x8 BBS RKII wheels. The look is perfect for me and sounds like what you're looking for.
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